I'm designing a creative / funny prank for OSX via command line. By running in the background, most users would not notice it when she/he first starts using the computer.

Using say command with creepy voice (Deranged) is my best bet. Setting volume to very low during saying the sentences is even more creepy! My problem is, I don't know how to grab current current volume to set it to the same volume after saying.

I'm not so sure this is a good post. This is more of an open-ended subjective post. If you'd like to edit it and make it more objective, that'd be great, but I'm going to vote to close it for now.
– daviesgeekJun 28 '13 at 19:29

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I think this question is off topic. BUT, I can't resist sharing this: Try fixing a piece of tape to the bottom of the user's mouse. Infared or laser won't pick up the location, so looks like their screen froze.
– ckpepper02Jun 28 '13 at 19:29

I intent to be ask a open ended question. Just like this
– MohsenJun 28 '13 at 19:39

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As mentioned, this is a list/poll style question that is not as productive or educational as the ones that we have allowed in the past.
– Nathan GreensteinJun 28 '13 at 19:48

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@Mohsen I love that avatar. Hit us up in Ask Different Chat and we might see about a blog post on pranks. I bet we could use the chat rooms to make some discovery and put it on the blog. I'd even help promote the chat room since it's summer and a little fun can't hurt if it's in the right place. Heck, the site owners often do hat contests and such so we could try a new way to have fun, no?
– bmike♦Jun 28 '13 at 21:02